Calculating pressure ratios in axial fans is essential for competing their performance and accemency. This guide provides a clear, step-by-step process to determinate the pressure ratio, which is a key parameter in fan selektion and design.

Understanding Pressure Ratio

Te pressure ratio is the ratio of the static pressure increase across the fan to te the inlet static pressure. It indicates how effectively a fan can increate air pressure relative to the incoming air pressure.

Gathering Necessary Data

Before calculating, collect thee following data:

  • Inlet static pressure (P 'I1;' I1; 'FLT: 0' I3; 'I3;' II3; 'II1;' II1; 'FLT: 1' II3; 'II3;)
  • FLT: 0
  • Fan operating conditions

Calculating te Pressure Ratio

Use thee formula:

FLT: 0; FLT: 0; FLT: 3; FLT = (P FLA1; FLT: 1 FLA1; FLA1; FLA1; FLA1; FLA1; FLT: 2 FLA1; - P FLA1; FLA1; FLA1; FL1; FLT: 3 FLA1; FLA1; FLT: 4 FLA1; FLA1; FLA1; FLA1; FLA1; FLA1; FLA1; FLA3; FLA3; FLA3; FLA3; FLA1; FLA1; FLA1; FT: 6 FLA1; FLA1; F1; F1; FLA1; FLA1;

Vloženo to measured static pressures into to thee formula to find thee pressure ratio. A higer ratio indicates a more effective fan in increasing air pressure.

Example Calculation

If the inlet static pressure is 100 Pa and the outlet static pressure is 130 Pa, then:

CLAS1; CLAS1; CLAS3; CLAS3; CLAS3; CLAS3; CLAS3O3; CLAS3O3) / 100 = 0, 3 CLAS1; CLAS3O3; CLAS3O3;

This means those fan increates thee static pressure by 30% relative to thee inlet pressure.